AIRBORNE PARTICLE MOVEMENT IN A GENERIC INDOOR SPACE
The video clip below shows the results of computer modeling of a classroom type space to demonstrate movement of micron-sized particles carried on room air currents. These particles could be biologically or chemically harmful and represent a health hazard via direct contact and inhalation. This model demonstrate that the conventional top-down mixing ventilation system common in the US promotes the dispersion of particles in indoor spaces. New ventilation methods are needed to purge indoor spaces of these harmful particles.
Classroom Main Sequence with air inlet at a 20-deg down angle. 6-min of exhalation +6-min purge when view angle changes [real time].
AIRBOURNE PARTICLE MOVEMENT IN A QUIESCENT ROOM
Video clip of mannequin discharge into a quiescent room (mechanical ventilation off). Restful breathing rate. Discharge of 3-micron (Blue) and 50-micron (Red) particles normal to inlet on head. First half is with discharge; second half is without to demonstrate continued movement of particles due to thermal currents in room (discharge at 92degF with mannequin surfaces are at 85degF). Real time about 18-min.